Who granted the honorary hereditary title of Aga khan to Aga Hassanaly Shah the 46th ismaeli imam?

The honorary hereditary title of Aga Khan was granted to Aga Hassanaly Shah, the 46th Imam of the Ismaili Shia Muslims, by the British colonial government in India in 1885. This title recognized his leadership and contributions to the Ismaili community. The title "Aga Khan" has since been passed down through his descendants, continuing to symbolize religious and social leadership.